View Code of Problem 104

#include<stdio.h>
#include<malloc.h>
#include<string.h>
#include<math.h>



int main()
{
	int n, v1, v2, t;
	while (scanf("%d%d%d%d", &n, &v1, &v2, &t) != EOF) {
		if ((n * 1000 - t * (v1 - v2)) > 0)
			printf("NO\n");
		else {
			float meet;
			meet = (float)n * 1000 / (float)(v1 - v2);
			printf("%.2f\n", meet);
		}
	}
	

}